num=987
num1=0b1001010#二进制
num2=0o765
num3=0x87ABF
print(num)
print(num1)
print(num2)
print(num3)
x=1.99E3
print(x)
print(0.1+0.2)
print(round(0.1+0.2,1))#保留一位小数